Though long since abandoned, the room still has all the magic it did when Dumbledore transformed it, though it may be a bit twisted due to the whole alternate-universe thing. You can decide what happenings will occur in here.

At the far end of the castle, there lies a great room that brings joy to many. Whatever holiday it might be, there's a dance going on! Even if there isn't a holiday, people are still on the dance floor, shaking their stuff. On Friday nights, you will catch the energetic dance club scene, while some Saturday nights you will catch the elegant ball room scene. It all depends really!